109 lines
4.2 KiB
C#
109 lines
4.2 KiB
C#
namespace System.Workflow.Activities
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{
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.CodeDom;
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using System.ComponentModel;
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using System.ComponentModel.Design.Serialization;
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using System.Diagnostics;
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using System.Reflection;
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using System.Workflow.ComponentModel;
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using System.Workflow.Runtime;
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using System.Workflow.ComponentModel.Compiler;
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using System.Workflow.ComponentModel.Serialization;
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using System.Workflow.Runtime.DebugEngine;
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[ToolboxItem(false)]
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[ActivityValidator(typeof(CodeConditionValidator))]
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[SRDisplayName(SR.CodeConditionDisplayName)]
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[Obsolete("The System.Workflow.* types are deprecated. Instead, please use the new types from System.Activities.*")]
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public class CodeCondition : ActivityCondition
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{
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public static readonly DependencyProperty ConditionEvent = DependencyProperty.Register("Condition", typeof(EventHandler<ConditionalEventArgs>), typeof(CodeCondition));
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[SRDescription(SR.ExpressionDescr)]
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[SRCategory(SR.Handlers)]
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[MergableProperty(false)]
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public event EventHandler<ConditionalEventArgs> Condition
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{
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add
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{
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base.AddHandler(ConditionEvent, value);
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}
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remove
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{
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base.RemoveHandler(ConditionEvent, value);
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}
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}
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#region Bind resolution Support
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protected override object GetBoundValue(ActivityBind bind, Type targetType)
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{
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if (bind == null)
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throw new ArgumentNullException("bind");
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if (targetType == null)
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throw new ArgumentNullException("targetType");
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object returnVal = bind;
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Activity activity = this.ParentDependencyObject as Activity;
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if (activity != null)
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returnVal = bind.GetRuntimeValue(activity, targetType);
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return returnVal;
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}
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#endregion
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public override bool Evaluate(Activity ownerActivity, IServiceProvider provider)
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{
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if (provider == null)
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throw new ArgumentNullException("provider");
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ConditionalEventArgs eventArgs = new ConditionalEventArgs();
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EventHandler<ConditionalEventArgs>[] eventHandlers = base.GetInvocationList<EventHandler<ConditionalEventArgs>>(CodeCondition.ConditionEvent);
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IWorkflowDebuggerService workflowDebuggerService = provider.GetService(typeof(IWorkflowDebuggerService)) as IWorkflowDebuggerService;
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if (eventHandlers != null)
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{
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foreach (EventHandler<ConditionalEventArgs> eventHandler in eventHandlers)
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{
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if (workflowDebuggerService != null)
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workflowDebuggerService.NotifyHandlerInvoking(eventHandler);
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eventHandler(ownerActivity, eventArgs);
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if (workflowDebuggerService != null)
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workflowDebuggerService.NotifyHandlerInvoked();
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}
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}
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return eventArgs.Result;
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}
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private class CodeConditionValidator : ConditionValidator
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{
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public override ValidationErrorCollection Validate(ValidationManager manager, object obj)
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{
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ValidationErrorCollection errors = new ValidationErrorCollection();
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errors.AddRange(base.Validate(manager, obj));
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CodeCondition codeCondition = obj as CodeCondition;
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if (codeCondition != null)
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{
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if (codeCondition.GetInvocationList<EventHandler<ConditionalEventArgs>>(CodeCondition.ConditionEvent).Length == 0 &&
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codeCondition.GetBinding(CodeCondition.ConditionEvent) == null)
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{
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Hashtable hashtable = codeCondition.GetValue(WorkflowMarkupSerializer.EventsProperty) as Hashtable;
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if (hashtable == null || hashtable["Condition"] == null)
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errors.Add(ValidationError.GetNotSetValidationError(GetFullPropertyName(manager) + ".Condition"));
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}
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}
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return errors;
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}
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}
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}
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}
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